Typewriter-eraser



H. IVI. CUTSHAW.

TYPEWRITER ERASEH.

APPLICATION FILED APH. I5. 1920.

Patented Apr. 26, 1921.

2 SHEETS-SHEET l.

W .W FM

H. IVI. CUTSHAW.

TYPEWRITER ERASEH.

APPLICATION FILED APR. I5. I920.

1,376,322. Patented Apr. 26, 1921.

2 SHEETS-SHEET 2.

wihwoo PATENT OFFICE.

HOWARD H. CUTSHAW, 0F GBEENEVILLE, TENNESSEE,

' Specification of Letters Patent.

Patented Apr. 26, 1921.

Application led A pril 15, 1920. Serial No. 874,096.

To all 'whom it may concern.'

Be it known that I, HOWARD M. CU'rsHAw, a citizen of the United States,residing at Greeneville, in the county of Greene and State of Tennessee,have invented a new and useful Typewriter-Eraser, of whichthe followingis a specification.

It is the obj ect of this invention to provide novel means whereby aneraser on a .typewriter may be brought downward by the action o a key,into coperating relation with the platen, rotation being imparted to theeraser.

It is within the province 'of the disclosure to improve generally and toenhance the utility of devices of that type to which the inventionappertains.

With the above and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that, within the scopel ofwhat is claimed, changes in the precise embodiment of the inventionshown can be made without departing from the spirit of the invention.

In the accompanying drawings lFigure 1 shows in perspective, a portionof a typewriter equipped with the device formi the subject matter ofthis application; 1g. 2 is a fragmental front elevation of the arm, theeraser and attendant parts; and Fig. 3 is a fragmental section takenthrough a typewriter from the frontto the back, the view depicting thedevice forming the subject matter of this application as it will appearwhen the eraser has been lifted with respect to the platen.

The numeral 41 denotes the frame-of an Oliver typewriter, the frameincluding an upstanding U-shaped member 2 at which one bank oftype-levers terminates. The keys of the typewriter are indicated .at- 3and the space bar appears at 4, the numeral 50 in Fig. 3 indicating theplaten-all as common in an Oliver typewriter.

In carrying out the'present invention, a.

U-shaped arm 5 is fulcrumed as indicated at 6 on the member 2. The arm 5may comprise, as shown in Fig. 3, coperating parts 46 having parallelflanges 47. The arm 5 has an ofset 7 to which a link 8 is connected, thelink 8 being united with a ke lever 9 fulcrumed at 10 on the framewor 1of the machine, the numeral 11 indicating any suitable spring means forraising the key lever 9. Generally stated, the foregoing constructionembraces merely the key mechanism of the well known Oliver typewriter.

The numeral 12 denotes an electric motor having a bracket 14, one end ofwhich is received between the anges 47 of the parts 46 of the arm 5,securing elements 15 connecting the flanges 47 with the bracket 14. Thebracket 14 is provided with an outstandlng bearing 16 wherein the shaft17 Aof the motor 12 is journaled. A shaft 18 is disposed at right anglesto the motor shaft 17 and is j ournaled in the end of the bracket 14.There is a beveled pinion 19 on the shaft 18 the pinion 19 meshing witha beveled pinion 20 on the shaft 17. An eraser 21 of circular outline ismounted on the shaft 18 and abuts against the beveled pinion 20, theeraser 21 being held in place by a thumb nut 22 threaded 'on the outerend O the shaft 18.

The numeral 23 indicates a conductor constituting part ,of an electricalcircuit in which the motor 12 is located,l the circuit comprising asource of electrical energy indicated at 24. A switch 25 is mounted onthe frame 1 of the typewriter in operative relation to the key lever 9,the switch 25 being interposed in the circuit of which the conductor 23forms a part. The switch, of course, may be of any desired constructionbut, if not expedient, it may include a button or plunger 26 locatedbeneath the lever 9.

In practical operation, when the free end of the key lever 9 isdepressed, the link `8 swings the arm 5l on its fulcrum 6 and brings theeraser 21 into engagement with the paper on the platen 50. When the keylever 9 is depressed, the switch 25-26 closes the circuit of which theconductor 23 forms a part, the motor 12 being energized, and rotationbeing imparted to the eraser 21 the beveled pinion 20, the beveledpinion 19 and the shaft 18. 4 As soon as pressure on the key lever 9 isreleased, the spring means 11 reacts and moves the arm 5 into theelevated position of 'F ig. 1,' the circuit at the switch 25-26beingbroken at the same time.

Having thus described the invention, what is claimed is 1. In atypewriter, a frame; an arm pivoted to the frame; a key movably mountedon the frame; means for connecting the key with through theinstrumentality of the shaft 17,

the arm; a -motor mounted on the arm; an eraser driven by the motor andcarried by the arm; and means responsive to the movement of the key`forstarting and stopping the motor. n y

2. In a typewriter, a frame; an arm pivoted to the frame; a key movablymounted on ythe frame; means for connecting the key with the arm; anelectrical motor; an eraser driven by the motor and carried by the arm;an electrical circuit including the motor; and means responsive to themovement of the key for opening and closing the circuit.

3. In a typewriter, a frame; an arm pivoted to the frame; a key movablymounted on the frame; means forconnecting the v'key with the arm; anelectrical motor mounted on the arm; an eraser driven by the motor andcarried bythe arm; an electrical circuit including the motor; andmeansresponsive to the movement of the key for opening and closing thecircuit.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

HOWARD M. CUTSHAW.

